Method and system for modular connections with electrical components

ABSTRACT

An electronic module for a modular patient care system is disclosed. The electronic module can include a housing having an attachment side configured to releasably attach to an adjacent electronic module. A latch mechanism can be configured to engage a catch member on the adjacent electronic module to secure the attachment side to the adjacent electronic module. An electrical connector positioned on the attachment side can be configured to electrically connect to an adjacent electrical connector on the adjacent electronic module. A sensor coupled to the housing can be configured to detect movement of the latch mechanism indicative of at least one of engagement or disengagement of the latch mechanism from the adjacent electronic module.

This application claims the benefit of priority to U.S. ProvisionalApplication No. 62/963,963 filed on Jan. 21, 2020, the entirety of whichis incorporated herein by reference.

BACKGROUND

Modular patient care systems can provide versatility and flexibility fortreatment or monitoring of patients across various patient care areas.Such systems can employ multiple modules mechanically and electricallycoupled together using releasable attachments that permit customizationand allow for exchange of power or data between coupled modules.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide furtherunderstanding of the subject technology and are incorporated in andconstitute a part of this description, illustrate aspects of the subjecttechnology and, together with the specification, serve to explainprinciples of the subject technology.

FIGS. 1A-1B illustrate a modular patient care system, in accordance withsome embodiments. FIG. 1A illustrates a front view of the system in aconfiguration having an interface module attached to a functionalmodule, and FIG. 1B illustrates a rear view of the system in aconfiguration having the interface module without the functional moduleattached.

FIG. 2 illustrates a front view of a modular patient care system in aconfiguration having an interface module attached to four functionalmodules, in accordance with some embodiments.

FIG. 3 illustrates a front view of a modular patient care system duringan attachment process, in accordance with some embodiments.

FIG. 4 illustrates a right perspective view of a modular patient caresystem, in accordance with some embodiments.

FIG. 5 illustrates a right side view of a modular patient care system,in accordance with some embodiments.

FIG. 6 illustrates a left perspective view of a modular patient caresystem, in accordance with some embodiments.

FIG. 7 illustrates a bottom perspective view of a modular patient caresystem, in accordance with some embodiments.

FIG. 8 illustrates an enlarged view of a pair of retention componentsfor a modular patient care system, in accordance with some embodiments.

FIG. 9 illustrates an enlarged view of a pair of electrical connectorsfor a modular patient care system, in accordance with some embodiments.

FIG. 10 illustrates an enlarged top view of a latch mechanism for amodular patient care system, in accordance with some embodiments.

FIG. 11 illustrates an enlarged bottom view of a latch mechanism for amodular patient care system, in accordance with some embodiments.

FIG. 12 illustrates an enlarged view of a latch mechanism engaged withan adjacent module, in accordance with some embodiments.

FIG. 13 is a schematic diagram of an example of an interface module, inaccordance with some embodiments.

FIG. 14 is a schematic diagram of an example of a functional module, inaccordance with some embodiments.

FIGS. 15A-15C illustrate perspective views of a latch mechanism for amodule of a patient care system, in accordance with some embodiments.

FIG. 16 is an exploded perspective view of an electrical connector for amodule of a patient care system, in accordance with some embodiments.

FIG. 17 is a top view of an electrical connector for a module of apatient care system, in accordance with some embodiments.

FIG. 18 is a bottom view of the electrical connector of FIG. 17.

FIG. 19 is a cross-sectional view of the electrical connector of FIG.17.

FIG. 20 is a cross-sectional perspective view of the electricalconnector of FIG. 17.

FIG. 21 is a detail cross-sectional view of the electrical connector ofFIG. 17.

FIG. 22 is a detail cross-sectional perspective view of an electricalconnector for a module of a patient care system, in accordance with someembodiments.

FIG. 23 is a detail cross-sectional perspective view of an electricalconnector for a module of a patient care system, in accordance with someembodiments.

FIG. 24 is a perspective view of an electrical connector for a module ofa patient care system, in accordance with some embodiments.

FIG. 25 is a plurality of cross-sectional views of an electricalconnector for a module of a patient case system, in accordance with someembodiments.

DETAILED DESCRIPTION

In the following detailed description, specific details are set forth toprovide an understanding of the subject technology. It will be apparent,however, to one ordinarily skilled in the art that the subjecttechnology may be practiced without some of these specific details. Inother instances, well-known structures and techniques have not beenshown in detail so as not to obscure the subject technology.

A phrase such as “an aspect” does not imply that such aspect isessential to the subject technology or that such aspect applies to allconfigurations of the subject technology. A disclosure relating to anaspect may apply to all configurations, or one or more configurations.An aspect may provide one or more examples of the disclosure. A phrasesuch as “an aspect” may refer to one or more aspects and vice versa. Aphrase such as “an embodiment” does not imply that such embodiment isessential to the subject technology or that such embodiment applies toall configurations of the subject technology. A disclosure relating toan embodiment may apply to all embodiments, or one or more embodiments.An embodiment may provide one or more examples of the disclosure. Aphrase such “an embodiment” may refer to one or more embodiments andvice versa. A phrase such as “a configuration” does not imply that suchconfiguration is essential to the subject technology or that suchconfiguration applies to all configurations of the subject technology. Adisclosure relating to a configuration may apply to all configurations,or one or more configurations. A configuration may provide one or moreexamples of the disclosure. A phrase such as “a configuration” may referto one or more configurations and vice versa.

Modular patient care systems can present a safety risk where, forexample, the modules are improperly secured or inadvertently bumped,which can cause operation or patient care to be interrupted. Thesesystems may also employ high currents or operate in environments exposedto therapeutic or bodily fluids, which presents a risk of damage toelectrical connection interfaces due to moisture or electrical arcingbetween modules.

FIGS. 1A-1B show an example of a modular patient care system 10, inaccordance with some embodiments. FIG. 1A shows a front view of themodular patient care system 10 including an interface module 100 and afunctional module 150 in an attached configuration, while FIG. 1B showsa rear view of the modular patient care system 10 with only theinterface module 100 in a detached configuration.

The modular patient care system 10 is an example of a modular systemthat can employ any of the attachment technologies further describedherein in connection with other figures. The modular patient care system10 includes a plurality of modules or units, such as an interface module100 and one or more of the functional modules 150, which may bereleasably or detachably coupled together.

Interface module 100 can be configured to perform any one or more of thefollowing functions in the patient care system 10: (i) it can provide aphysical base of the system that attaches to structures such asintravenous (IV) poles or bed rails; (ii) it can provide power tocomponents of the system such as, for example, the functional module(s)150; (iii) it can provide an interface between the system and externaldevices, and/or (iv) it can provide a primary or centralized userinterface of the system. Interface module 100 can include input/output(I/O) devices that can be configured for interaction with a user. TheI/O devices shown in FIG. 1A include a display device 102 and buttons,including hard keys 104 and soft keys 106. While a display and buttonsare shown, it is contemplated that the modular patient care system 10 orany module thereof can include or be coupled to any suitable I/O devicesto permit user observation or control, such as, for example, one or morespeakers, microphones, motion sensors, touch sensors, pointing devices,or depth sensors.

Display device 102 may be implemented as any suitable type ofinformation display, such as, for example, a liquid crystal display(LCD), an organic light-emitting diode (OLED) display, or a micro-LEDdisplay. Display device 102 may be configured to be used during setupand operating procedures to facilitate data entry and editing. Displaydevice 102 may also be used to display various operating parameters,such as volume to be infused (VTBI) for individual functional modules150, current time of day, prompts, advisories, and/or alarm conditions.

As noted, interface module 100 is shown with a plurality of hard keys104 and soft keys 106, which can be used for entering data and commands.The numerical hard keys 104 can be configured to enter numerical data,while remaining keys of the hard keys 104, as well as the soft keys 106,can be configured to enter operational commands. Soft keys 106 are shownarranged along the edges of the display device 102 so as to interactwith information presented on the display device 102 to define thefunction of a particular soft key 106 at any given time. Accordingly, aparticular soft key 106 when pressed can allow for the selection of anoption, or an infusion or monitoring parameter, which is displayed onthe display device 102 adjacent to the particular soft key. As noted,hard keys 104 may also be used for entering specific operationalcommands. For example, particular hard keys when pressed can berespectively configured to cause the system to change from standby modeto an operating mode, to temporarily disable audio functionality ofinterface module 100, or to allow a user access to available system orfunctional module options, among other possible commands.

As shown in FIG. 1A, interface module 100 can also include one or moreindicators for providing indications of various conditions of the moduleor other information. In FIG. 1, interface module 100 is shown withthree indicators, including a communication indicator 114, an externalpower indicator 116, and an internal power indicator 118. Communicationindicator 114 may be configured to indicate that the system iscommunicating with a compatible external computer system. External powerindicator 116 may be configured to indicate that interface module 100 isconnected to and operating with an external power source. Internal powerindicator 118 may be configured to indicate that the interface module100 is operating with the use of an internal power source (e.g., abattery). Each of the indicators may, for example, include a lightsource such as a light emitting diode (LED) that is configured toilluminate to provide the respective indication when the correspondingcondition is present.

The modular patient care system 10 may also include one or more externalcommunication interfaces 120. In the example shown in FIG. 1B, acommunication interface 120 is located at the rear of interface module100. Communication interface 120 can be, for example, an industrystandard wireless network memory card or a personal computer memory cardinternational association (PCMCIA) slot for receiving PCMCIA cards,although one skilled in the art could select from a variety ofcommercially available communication protocols or industry standards.The modular patient care system 10 may also include one or moreinterface ports 122. In the example shown in FIG. 1B, interface port 122is located at the rear of interface module 100. The interface port 122can include, for example, industry standard RS-232 ports and/or RJ45ports, although again, one skilled in the art could select from avariety of commercially available communication protocols or industrystandards. Further, although the example shown in FIGS. 1A-1B isdescribed as containing communication interface 120 and interface port122, any number or combination of communication interfaces and/or portscould be included in various embodiments of the interface module 100.

Communication interface 120 and/or interface ports 122 may, for example,be used to download drug libraries, drug delivery profiles, other systemconfiguration values, and/or may be used to upload event history datafrom interface module 100. Additionally or alternatively, communicationinterface 120 and/or interface port 122 may act as an interface topatient monitoring networks and nurse call systems, or as an interfaceto external equipment such as barcode readers to provide a means ofinputting drug and/or patient information from medication or patientrecords. In some embodiments, interface ports 122 and/or communicationinterface 120 may be supplemented with one or more peripheral deviceports, such as a Patient Controlled Analgesia (PCA) port. The PCA portcan provide a connection to a remote hand-held dose request button,which can be used by a patient to request a medication dose during PCAapplications.

As seen in FIG. 1B, interface module 100 can also include a clamp 170for use in attaching interface module 100 to a structure such as an IVstand or a hospital bed. In the example shown in FIG. 1B, the clamp 170is positioned on a rear surface of the interface module 100. The clamp170 may be any clamp suitable for attaching bedside patient monitoringor infusion apparatus to these structures.

Also shown in FIG. 1A is a functional module 150. It is to be understoodthat although only a single functional module 150 is shown in FIG. 1A,the modular patient care system 10 can be configured so that any numberof functional modules 150 may be connected using modular attachmentmechanisms described herein, and in any order to either or both sides ofinterface module 100. The type and number of functional modules 150attached to interface module 100 may be any suitable number based on thephysical and electric ability of the wiring and of the interface moduleto handle the desired types and numbers of functional modules.Functional module 150 may be selected from a wide variety of functionaldevices, including those for patient therapies and/or patientmonitoring. For example, functional module 150 may be an infusionpumping module, a PCA module, a syringe pump module, a pulse oximetrymodule, an invasive or non-invasive blood pressure monitor module, anelectrocardiograph module, a bar code or identification (ID) code readermodule, a printer module, a temperature monitor module, a radiofrequency(RF) telemetry link module, a fluid warmer/IV pump module, or a highrate IV pump module (e.g., 2000+ ml/hr). It is also contemplated thatthe functional module 150 could be adapted for other uses.

Each functional module 150 can include a channel position indicator 155,which identifies the position of the functional module within themodular patient care system 10. By way of example, the modular patientcare system 10 may include four channel positions, A, B, C, and D. Whenfour functional modules are attached in the system, the functionalmodules can each respectively be in one of the four channel positions A,B, C, and D, and the channel position indicator 155 on each individualfunctional module can visually indicate the corresponding channelposition. The channel positions can be designated A-D, beginning withthe first module on the left. The positions of each functional modulewith respect to each other or with respect to the interface module 100may be interchanged, but the channel locations A-D may stay in the samepositions.

FIG. 2 illustrates an example with four functional modules attached tointerface module 100, in accordance with some embodiments. Regardless ofwhich module is placed immediately to the left of interface module 100,that module can always indicate channel position B on the channelposition indicator 155. The functional modules may each further containcertain function specific information, which is communicated tointerface module 100 to indicate what type of functional module is ateach channel position. Each functional module 150 may also have one ormore buttons, such as a select key 156, which permits selection of themodule.

In the example shown in FIG. 2, the modular patient care system 10includes four different functional modules, including a pulse oximetrymodule 150A at position A, a syringe pump module 150B at position B, aPCA module 150C at position C, and an infusion pump module 150D atposition D. The respective position of each functional module isindicated on the functional module at indicator 155. Because fourfunctional modules are in use, display device 102 on interface module100 indicates A through D. The system can be configured to allowselection of a functional module to perform a particular function orprocedure through interface module 100 by depressing the appropriatesoft key 106 adjacent to the desired, indicated channel and functionalmodule. Additionally or alternatively, the system can be designed suchthat selection of a particular functional module is accomplished bypressing the select key 156 located on the desired functional module inorder to select that functional module. When the desired functionalmodule is selected, display device 102 of the interface module 100 canbe configured so as to act as the user interface for the selectedfunctional module. For example, display device 102 can be configured inaccordance with a function specific domain to provide function specificdisplays and soft keys based on the selected functional module.

Infusion pump module 150D shown in FIG. 2 is a pumping device for basicfluid infusion. Infusion pump module 150D can include a control systemto control the various functions performed by such a pump, including thecontrol of fluid delivery to the patient and the monitoring of the fluidpath for occlusion or air-in-line. In the example shown, infusion pumpmodule 150D includes two display devices, including a rate display 154that may be used to display the actual infusion rate at which the pumpis operating, and a channel message display 152 that may be used todisplay informational, advisory, alarm, or malfunction messages.

The infusion pump control may also contain input devices such as hardkeys for data and command entry. Select key 156 of the infusion pumpmodule 150D may be implemented as a hard key, and may be configured toallow the user to select a channel for infusion parameter entry. Otherinput devices such as other hard keys when pressed may, for example, beconfigured to pause an infusion while the infusion is occurring, beconfigured to resume operation of a previously paused infusion, or beconfigured to stop the infusion occurring on the channel, deselect thechannel, and if the functional module on the channel has been the onlyfunctional module operating, power off the system. Infusion pump module150D may contain one or more indicators, which illustratively illuminatewhen the functional module is in alarm or infusion complete condition,when the functional module is programmed for a future start time or hasbeen paused, or when the functional module is performing an infusion.Other appropriate indicators may be included in other functionalmodules.

Also shown in FIG. 2 is pulse oximetry module 150A, syringe pump module150B, and PCA module 150C. As shown, pulse oximetry module 150A, syringepump module 150B, and PCA module 150C each contain a set of buttons suchas hard keys like those found on infusion pump module 150D. Pulseoximetry module 150A is a pulse oximetry device, and it includes or iscoupled to a peripheral device containing a pulse oximetry sensor 199that can couple directly to a patient to measure the oxygenation in thepatient's blood. Syringe pump module 150B is a pumping device forprecision fluid delivery, and can contain a syringe along with a syringepusher for manually infusing fluids. For example, syringe pump module150B is shown with a syringe receptacle 151B that is configured toreceive a syringe therein. PCA module 150C is a drug delivery device,and it includes or is coupled to a peripheral device containing a doserequest button 197 that can be pressed directly by a patient to requesta dosage of medication or trigger delivery of a dosage of analgesia. PCAmodule 150C can also include a door lock 161 for providing security forenclosed narcotics or other matter to be infused. PCA module 150C isalso shown with a syringe receptacle 151C configured to receive asyringe therein. In addition, pulse oximetry module 150A, syringe pumpmodule 150B, and PCA module 150C each include one or more displays andone or more indicators which may be used to present appropriateinformation.

In modular systems such as the modular patient care system 10,releasable or detachable modular attachment mechanisms can be employedto allow for customization or reconfiguration during use, while provideelectrical and mechanical connections when modules are attached. In theexample shown in FIGS. 1A-2, electrical connectors and latch mechanismscan be located on opposing sides of each module, including interfacemodule 100 and each functional module. Such mechanisms can be used todirectly attach any functional module to the interface module, ordirectly attach any functional module to any other functional module, ina linear arrangement in which the modules are stacked side by side in arow. These attachment mechanisms can provide physical support for theattached functional modules and also provide power and internalcommunication connections between the interface module 100 and thefunctional modules. The attachment mechanisms can be made identical toeach other across different modules so that each module can be capableof mating with another module. Optionally, some attachment mechanismsmay prevent inadvertent connections between two interface modules 100.

FIG. 3 illustrates the modular patient care system 10 during an exampleof an attachment process or sequence that can be used to releasablyattach a pair of modules to each other. FIG. 3 shows a front view of thesystem with the left side 260 of functional module 150 being attached tothe right side 250 of the interface module 100. As seen in FIG. 3, anupper end portion of the functional module 150 can include a retentioncomponent 210 on its left side, which can mate with a complementaryretention component on the upper end portion of the right side of theadjacent module. The retention component 210 can be mated by moving theleft side 260 of the functional module 150 into the right side 250 ofthe interface module 100 at an angle, so that the retention component210 of the functional module can mate, seat, or insert into thecomplementary retention component of the interface module 100. Uponmating or engagement of the retention components, the mated retentioncomponents or upper end portions of the adjacent modules can thenprovide an anchor or pivot point for the functional module 150 to berotated thereabout. Upon rotation of the functional module 150 (e.g., indirection of arrow 214 about the retention component 210), the bottomend portion of the functional module 150 can be secured against thebottom end portion of the interface module 100, to engage a latchmechanism 212 at the bottom end portion of the functional module 150with a complementary mechanism at the bottom end portion of theinterface module 100. Upon latching engagement of the latch mechanism212, the adjacent modules may be secured in a side by side arrangement(for example as seen in FIG. 1A). These steps may be performed by a user(e.g., a medical practitioner or technician) gripping and manipulatingthe functional module 150 to move the functional module and secure theadjacent modules together.

FIGS. 4-7 illustrate various views of a mechanical and electricalattachment mechanism for the modular patient care system 10, inaccordance with some embodiments. FIG. 4 shows a right perspective view,FIG. 5 shows a right side view, FIG. 6 shows a left perspective view,and FIG. 7 shows a bottom side view, with each of these figures showingthe modular patient care system 10 with multiple functional modules 150attached together. FIGS. 8-12 illustrate enlarged views of variouscomponents of the attachment mechanism, in accordance with someembodiments.

As seen in the figures, each of the functional modules 150 can include ahousing or casing 218, which can house internal components of the moduletherein, such as, for example, one or more processors, memory,batteries, power supplies, circuitry, pumps, and/or motors. Attachmentmechanisms are disposed on opposing sides or opposing side surfaces ofeach housing 218 to permit the housings to be attached together in aside-by-side arrangement. Mechanical and electrical attachmentmechanisms, including mechanical retention members 210, electricalconnectors 220, and latch mechanisms 212 are located at the opposingattachment sides of each housing 218 and are configured to mate witheach other to secure the attachment sides of adjacent modules together.The mechanisms shown can be configured to facilitate an attachmentsequence like that shown and described above with respect to FIG. 3. Anactuator 224 is coupled to the latch mechanism 212 of each module 150and can operate the latch mechanism 212 to release or detach the modulefrom the adjacent module attached to its right side 250 and/or its leftside 260. Although the mechanisms are described with respect tofunctional modules 150, it is contemplated that the mechanism can beapplied to any other suitable modules of a modular system, including,for example, the interface module 100.

Referring to FIGS. 4-7, each housing 218 is shown as having a generallyrectangular box shape with a front side 270, a rear side 280, a rightside 250, and a left side 260. The front side 270 corresponds to thefront side of the module 150 (e.g., as seen in FIG. 1A), and the rearside 280 is opposite to the front side and corresponds to the rear sideof the module. The left side 260 and the right side 250 each adjoin thefront side 270 and the rear side 280, with the left side 260corresponding to the left side of the module when viewed facing thefront side 270, and the right side 250 being opposite to the left side260 and corresponding to the right side of the module when viewed facingthe front side 270. The left and right sides correspond to attachmentsides of the modules that are each configured to mate with thecomplementary attachment sides of adjacent modules.

On each of the attachment sides, i.e., the left side 260 and the rightside 250 in this example, a retention component 210 is located at anupper end portion 232 of the housing 218, and a latch mechanism 212 islocated at a lower end portion 234 of the housing 218. An electricalconnector 220 is shown as a separate connector from the latch mechanism212 and retention component 210, located intermediate the latchmechanism 212 and retention component 210, and located closer to thelatch mechanism 212 than the retention member 210. The actuator 224 isimplemented as a mechanical actuation button coupled to the latchmechanism 212 and located at the bottom end portion 234 on the frontside 270 of the housing 218.

The retention components 210 are configured to mate with each other toprovide structural support for end portions of adjacent modules, withoutnecessarily being configured to lock them together. As further seen inthe enlarged view of FIG. 8, the retention components 210 includefeatures that permit them to slidingly engage each other to facilitateretaining support of the corresponding ends of the modules. Eachretention component 210 can include one or more protrusions 342, and oneor more recesses 344 that are each configured to receive a protrusionfrom an adjacent retention component slidably inserted therein. In FIG.8, the protrusions 342 and recesses 344 have rounded profiles, which mayenhance the ease with which protrusions 342 can be slid into therecesses 344. Also, multiple protrusions 342 and multiple recesses 344(in this case a pair of each), are shown disposed across the width ofthe retention component 210, with the recesses interposed between theprotrusions and vice versa, which may enhance the balance of supportprovided by the retention component across the width of the attachmentside compared to an implementation utilizing only one protrusion andrecess on each retention component. The retention components 210 can bemade from or can otherwise include electrically conductive materials(e.g., metal) so that the retention components can provide a groundingpath between attached modules.

The electrical connectors 220 are configured to make electricalconnections between adjacent modules upon mechanical attachment. Asfurther seen in the enlarged view of FIG. 9, the electrical connectors220 can each include multiple contacts 358 that provide multiplerespective channels for exchanging signals between the modules. Eachchannel may correspond to a particular signal, such as a groundconnection, a data connection, or a power connection. The contacts 358of adjacent connectors 220 are configured to make galvanic contact witheach other, upon mechanically engaging or attaching adjacent modulestogether, to permit the exchange of signals there between.

The latch mechanisms 212 are configured to mechanically secure adjacentmodules together via latching engagement between the adjacent modules.FIGS. 10-11 show enlarged views of the latch mechanism 212 of theexample of FIGS. 4-7, in which FIG. 10 is a top side view and FIG. 11 isa bottom side view. FIG. 12 shows an enlarged view of the latchmechanism 212 in an engaged configuration in which it is latched onto anadjacent module.

As further seen in the enlarged views of FIGS. 10-12, each latchmechanism 212 can include a catch member 242, and a movable engagementmember 252 that is configured to engage with and latch onto the catchmember 242 of an adjacent module. Each of the engagement member 252 andthe catch member 242 can include complementary hook features 266 thatengage with each other for securely retaining the latch in an engagedconfiguration. The actuator 224 can include an actuation button that isfixed to components of the latch mechanism and configured to move ortranslate components of the latch mechanism. The movement of the latchmechanism 212 based on operation of the actuation button can release thehook features 266 to disengage the engagement member 252 from the catchmember 242. In the example shown in FIGS. 4-7, the catch member 242 islocated at the right side 250 of each module, while the engagementmember 252 is located at the left side 260 of each module and isconfigured to engage the catch member 242 of the adjacent module to theleft. It is contemplated that other arrangements are possible,including, for example, the reverse in which the catch member 242 islocated on the left side and the engagement member is located on theright side. Also, while the catch member 242 is shown as part of a latchcomponent that is attached to the housing 218, it is contemplated thatthe catch member 242 may be implemented as a fixed part of the housing218, e.g., with hook features 266 formed as an integral part of thehousing 218.

Although a particular arrangement of the attachment components on theleft and right sides of the housings are shown, it is contemplated thatvarious other arrangements, configurations, and positions are possiblefor these attachments components. For example, the locations of thelatch mechanism 212 and retention component 210 can be reversed withrespect to the upper and lower end portions, so that the retentioncomponent 210 is located at the bottom end portion 234 and the latchmechanism 212 is located at the upper end portion 232. As anotherexample, these components can be located on other opposing ornon-opposing sides of the housing 218 for other types of attachment orcoupling configurations for the set of modules.

FIG. 13 is a schematic diagram of an example of the interface module100, in accordance with some embodiments. In the example shown in FIG.13, interface module 100 contains a power input 268 for receiving powerfrom an external power source and forwarding that power to power supply258. Interface module 100 also contains an internal power source 262,which may be used to maintain power to the system functions, includingmemory, when interface module 100 is disconnected from an external powersource. Power supply 258 can convert power from either external powerinput 268 or internal power source 262 to voltages that are appropriatefor operating parts of the system. Power management unit 254 can controlthe switchover between the two power sources, control the charging ofinternal power source 262, monitor the remaining capacity of internalpower source 262, monitor system power consumption under batteryoperation, and use system power consumption and remaining batterycapacity to estimate remaining system runtime on internal power source262. Power supply 258 can also supply power to the rest of the systemthrough power ports 278 and 279 as well as to audio alarm 261, therebyproviding audio functionality of the system.

Microprocessor 264 and memory 251 can receive and process data andcommands from the user, as well as communicate with and controlfunctional modules 150 and other devices external to the system. It isto be understood that memory 251, as well as other memories in thepatient care system, may be any type of memory or any combination ofmemories that can be erased and reprogrammed. Examples of such memoriesinclude, but are not limited to, battery-backed random access memory(RAM) and flash electronically erasable programmable read only memory(FLASH EEPROM). Battery backup 256 can provide power to memory 251 tomaintain the information stored in the memory in the event of loss ofpower from both the power input 268 and the internal power source 262.Interface module 100 also contains a keyboard 267 (which includes hardkeys 104 and soft keys 106) and a display device 102, as discussed inconjunction with FIGS. 1A-2 above.

Power ports 278 and 279, fed by power supply 258 can provide power tofunctional modules 150 through connectors 220. Connectors 220 can alsocontain internal communication ports 283 and 281, respectively, whichprovide a data and command interface with attached functional units 150.Ports 283 and 281 can be controlled by internal communicationscontroller 272, which in turn can be controlled by microprocessor 264.Finally, external communications controller 274 can control the commandand data flow through interface ports 122, while microprocessor 264 candirectly control communication interface 120.

FIG. 14 is a schematic diagram of an example of a functional module, inaccordance with some embodiments. In this example, the functional moduleis configured as infusion pumping module 150A. FIG. 14 illustrates thevarious aspects of a control system for infusion pump module 150A.Display device 359 can include rate display 154, channel display 152,and the various visual indicators 164 discussed in conjunction with FIG.2. Keyboard 354 can be made up of the various buttons including hardkeys as also previously discussed, and can be controlled, along withdisplay device 359, by keyboard/display controller 362. Supportprocessor 360 and associated memory 368 can be configured to receive andprocess data and commands from the user, as well as communicate with theattached interface module. For example, support processor 360 and memory368 can be configured to perform calculations for a designated infusionusing infusion data entered by the user. Memory 368 can have a batterybackup 376 so as to maintain the information stored in memory when thefunctional module is not receiving power from an external source.Battery backup 376 may also be used to power audio alarm 350, which mayemit a signal when an infusion is complete or there is a failure of themain power source. Power management unit 352 can obtain power from powerports 380 or 381, which are included in the electrical connectors 220which connect the functional modules to the interface modules or otherfunctional modules. Electrical connectors 220 can connect through powerline 377 and distribute the power to the components of infusion pumpmodule 150A. Like the interface module 100, infusion pump module 150Acan also contain an internal communications controller 357, which may beconfigured to send or accept data or commands from the interface modulethrough communication line 379 and communication ports 382 and 383,which can also be contained in the electrical connectors 220. Thesepower and communication ports connected by the power and communicationlines can allow functional units to be connected side-by-side, yet stillcommunicate with the interface module through intervening functionalmodules while not directly attached to the interface module.

Infusion pump unit 150A can also include components to facilitatepumping, such as motor controller 364 for controlling pump motor 366 andsensor controller 372 to obtain indications from sensors 374. Sensors374 may be used to detect pump mechanism speed and fluid pressure,air-in-line, and flow stoppage. Motor controller 364 and pump motor 366may, for example, include any suitable peristaltic pump motor/motorcontroller combination. Pump motor 366 can be configured to urge fluidfrom a fluid reservoir through an infusion set to a vascular accessdevice (e.g., a catheter) by peristaltic motion. It is contemplated thata variety of commercially available fluid reservoirs, sets, vascularaccess devices and other infusion materials can be used in conjunctionwith infusion pump module 150A.

Sensor controller 372 can be configured to receive signals from sensors374, which for example sense pump motor direction and speed, thepresence of air in the fluid path, fluid path pressure, open or closedstate of the pump door, open or closed state of a flow stop device,and/or movement of a latch mechanism, and forward this information tosupport processor 360. If support processor 360 determines that anundesired or other predetermined event is occurring, the supportprocessor is capable of taking further action such as placing pump unit150A in an advisory or alarm state, stopping the infusion, shutting downthe pump unit, and/or forwarding information to the attached interfacemodule for full system shutdown.

Safety processor 378 can be configured to monitor these same signalsfrom sensors 374. Safety processor 378 can also receive pump operatingparameters from support processor 360, such as current infusion rate,VTBI, and fluid path pressure alarm limits. Safety processor 378 can beconfigured to independently calculate values, such as the appropriatemotor speed from these parameters, and using these values, monitorssensor 374 for proper pump motor direction and speed, the presence ofair in the fluid path, fluid path pressure, open or closed state of thepump door, and open or closed state of the flow stop device. When safetyprocessor 378 determines that an undesired event is occurring, thisinformation can be forwarded to support processor 360 for furtheraction, or the safety processor may independently shut down thefunctional module.

Infusion pump module 150A (or any other functional module 150) can beconfigured without a local source of power (with the exception of thememory retention and the audio alarm features described above), andtherefore may not be able to continue to operate in the event of failureof the main power source, such as when the functional module is detachedfrom the interface module. This can ensure that the functional unit isnot operated without the safety and control features provided by theinterface units. Also, the simplified commands available directly at thepump functional unit are not intended to replace the interfacecapabilities of advanced interface unit 100 or basic interface unit 200.However, when provided with power and the necessary input values (suchas VTBI and infusion duration) from the interface unit, the infusionpump unit as a functional unit is capable of controlling all aspects ofan infusion.

Interface module 100 can also include a sensor 374, which is configuredto detect mechanical movement of latch mechanism 212. The latch sensorcan be configured to detect movement of the latch mechanism that isindicative of engagement and/or disengagement of the latch mechanism 212with an adjacent module. The latch sensor can be used alone or incombination with electrical information detected through the electricalconnector 220 to determine when the interface module is attached ordetached from an adjacent module. Such signal can be used by a processorof the system, such as support processor 356, to enforce a requirementthat the latch mechanism be engaged before permitting corefunctionalities of the modules to operate, such as pumping operations,diagnostic measurement operations, or the like. For example, the systemcan be configured to prevent such operations until detecting movement ofthe latch mechanism that is indicative of engagement and secureattachment between modules, then upon detecting the latch movement thesystem may enable such operations in response.

FIGS. 15A-15C illustrate perspective views of a latch mechanism 410 fora module patient care system 400, in accordance with some embodiments.In the depicted example, the latch mechanism 410 allows for a mechanicalconnection between functional modules 450. By engaging the latchmechanism 410, a functional module 450 can be mechanically coupled toanother functional module 450 or another component of a patient caresystem 400.

Along with allowing for mechanical coupling and decoupling of functionalmodules 450, the latch mechanism 410 can allow for electrical connectors420 to be properly engaged and released as desired. Therefore, byengaging the latch mechanism 410, a functional module 450 can bemechanically and electrical coupled to another component of the patientcare system 400.

With reference to FIG. 15B, during operation, the latch mechanism 410can be rotated relative to the module body 452 to move the latch body412 between an unlatched position and a latched position. In thedepicted example, the latch body 412 can be in an unlatched position toallow the functional module 450 to be disengaged or released fromanother component of the patient care system 400. As can be appreciated,the electrical connector 420 of the functional module 450 can also beelectrically disconnected in the unlatched position.

During operation, the latch mechanism 410 can be rotated relative to themodule body 452 to move the latch body 412 into a latched position. Inthe depicted example, the latch body 412 can be moved clockwise orupward toward the module body 452 to move the latching mechanism intothe latched position. In some embodiments, the latch body 412 caninclude hook protrusions 414 extending from the latch body 412 to allowthe latch body 412 to positively engage with a complimentary functionalmodule 450 or other component of the patient care system 400. In someembodiments, the hook protrusions 414 can engage in a complimentaryrecess or groove of a mating component. Optionally, the hook protrusions414 can have a resilient construction.

With reference to FIG. 15C, during operation, the latch mechanism 410can be translated relative to the module body 452 to move the latch body412 between an unlocked and locked position. In the depicted example,the latch body 412 can be in an unlocked position to allow the latchbody 412 to rotate as described above. In some embodiments, the latchbody 412 is moved inward relative to the module body 452 to an unlockedposition. In some embodiments, an eject mechanism on the module body 452is depressed to move the latch body 412 to the unlocked position.

In some embodiments, upon release of the eject mechanism, the latch body412 can translate into a locked position. Optionally, the latch body 412can be spring loaded or biased to the locked position. In the lockedposition, the latch body 412 may prevent the rotation of the latchmechanism 410, preventing inadvertent engagement or disengagement of thefunctional module 450 within the patient care system 400.

In some embodiments, the latch mechanism 410 can include a latch sensor430 to detect movement of the latch body 412 relative to the module body452. In the depicted example, the latch sensor 430 can be disposed on orwithin a latch extension 416 disposed within the module body 452. Duringoperation, the latch sensor 430 can move with the latch body 410 as thelatch body 412 is rotated and/or translated as described above. In someembodiments, the latch sensor 430 can be fixed within the module body452 and sense the movement of the latch body 412.

In some embodiments, the latch sensor 430 can be a hall effect sensor,an optical interrupt sensor, a capacitance sensor, and/or an inductancesensor. Optionally, the latch sensor 430 can withstand or resist fluidingress. In some embodiments, the latch sensor 430 can be unidirectionaland can detect the rotation or translation of the latch body 412. Insome embodiments, the latch sensor 430 is omnidirectional and can detectthe rotation and the translation of the latch body 412. Optionally, thelatch body 412 can include a magnet that is adhered, affixed, orovermolded therein to permit the latch sensor 430 to detect rotationand/or translation of the latch body 412.

In the depicted example, the latch sensor 430 can detect the translationof the latch body 412, such as when an eject mechanism translates thelatch body 412. By detecting the motion of the latch mechanism 410, thelatch sensor 430 can be used to determine a user's intent, such as whena user intends to connect or disconnect a functional module 450.

Upon detecting that an unlatching event is occurring, the functionalmodule 450 can log the event and switch power off to the electricalconnector 420 to prevent arcing and corrosion. By sensing the positionof the latch body 412, the functional module 450 can ensure thatelectrical signals are not sent to the electrical connector 420 when thefunctional module 450 is unlatched.

Similarly, the latch sensor 430 can be used to detect the rotation ofthe latch body 412, such as when the latching mechanism 410 is engagedwith a receiving functional module 450. By detecting the rotationalmotion of the latch mechanism 410, the latch sensor 430 determine if thelatch body 412 is being engaged or disengaged with a complimentaryfunctional module.

Therefore, during operation, the latch sensor 430 can be used todetermine when electrical connections to the electrical connector 420are made and mechanical connections at the latch mechanism 410 aresecurely made between adjacent modules. Upon this determination,electrical power can be switched on in a controlled fashion, andintra-module communication can be initiated.

FIG. 16 is an exploded perspective view of an electrical connector 520for a module of a patient care system, in accordance with someembodiments. In the depicted example, the radial seal 530 can protectthe electrical connector 520 from liquids such as cleaning chemicalsthat may damage the structure of the electrical connector 520 or mayaffect the electrical connection provided by the electrical connector520.

In some embodiments, the radial seal 530 is an elastomeric seal thatcovers the electrical connector 520 to protect the electrical connector520 from liquids such as cleaning chemicals. The radial seal 530 can beformed from any elastomeric material or any other resilient material. Insome embodiments, the radial seal 530 can be a urethane casting orovermold. The radial seal 530 can include a seal body 532 to generallycover the connector face 522 of the electrical connector. Optionally,the radial seal 530 can extend over the connector edge 526. Asillustrated, the seal edge 536 of the seal body 532 can extend over andengage with the connector edge 526. Optionally, the seal edge 536 and/orthe connector edge 526 can allow for alignment of a mating connectorwith the electrical connector 520. In some embodiments, the seal 530 canbe an axial seal.

As can be appreciated, the radial seal 530 can include apertures 534 tofacilitate mechanical and electrical connection with the connector pins524 extending from the connector face 522. Optionally, the variousconnector pins 524 can have different or staggered heights. Bystaggering the heights of the connector pins 524, the order ofconnection of the connector pins 524 can be controlled. For example, thelongest pin 524 can come into contact with a mating connector before ashorter connector pin 524. Similarly, during disconnection, a shorterconnector pin 524 can be disconnected before a longer connector pin 524is disconnected. By altering the heights of the connector pins 524,certain functions or connections can be made active upon connection orremain active until the end of disconnection.

In some embodiments, the connector pins 524 can be cantilevered to beurged or biased toward a return or resting position.

FIG. 17 is a top view of an electrical connector 620 for a module of apatient care system, in accordance with some embodiments. Similar to theelectrical connector 520, the radial seal 630 can protect the electricalconnector 620 from liquids such as cleaning chemicals that may damagethe structure of the electrical connector 620 or may affect theelectrical connection provided by the electrical connector 620.

In some embodiments, the radial seal 630 is an elastomeric seal thatcovers the electrical connector 620 to protect the electrical connector620 from liquids such as cleaning chemicals. The radial seal 630 can beformed from any elastomeric material, such as a thermoplastic elastomer,or any other resilient material. In some instances, the radial seal 630can extend over the outside diameter of the electrical connector 620. Insome embodiments, the radial seal 630 can be bonded or otherwisemechanically interlocked to the substrate of the electrical connector620. As can be appreciated, the radial seal 630 can hold portions of theelectrical connector 620 in place. Advantageously, the radial seal 630can prevent peeling or separation of the electrical connector 620.

As can be appreciated, the radial seal 630 can include apertures 634 tofacilitate mechanical and electrical connection with the connector pins624 extending from the electrical connector 620. In some embodiments,the apertures 634 can be undersized to prevent molding flash fromcovering the connector pins 624.

FIG. 18 is a bottom view of the electrical connector 620 of FIG. 17.FIG. 19 is a cross-sectional view of the electrical connector 620 ofFIG. 17. FIG. 20 is a cross-sectional perspective view of the electricalconnector 620 of FIG. 17. FIG. 21 is a detail cross-sectional view ofthe electrical connector 620 of FIG. 17. With reference to FIGS. 17-21,the connector pins 624 can be secured within the electrical connector620.

In the depicted example, the radial seal 630 can interface with featuresof the connector pins 624 to retain the connector pins 624 within theradial seal 630 and the electrical connector 620 to prevent pullout ofthe connector pins 624. For example, an upper contact head 642 and alower contact head 644 can each radially extend from the stud 646 of theconnector pin 624 to engage with the radial seal 630. In someembodiments, the upper contact head 642 and the lower contact head 644can be spaced apart to capture a portion of the radial seal 630 therebetween, retaining the connector pin 624 within the radial seal 630.Optionally, the upper contact head 642 and/or lower contact head 644 canbe larger than the respective aperture 634 of the radial seal 630 toprevent pullout of the connector pin 624. In some embodiments, the lowercontact head 644 can be larger than the upper contact head 642.

As can be appreciated, the connector pins 624 can be inserted into theradial seal 630 from the inner face of the radial seal 630. In someembodiments, the apertures 634 can elastically stretch to allow theupper contact head 642 to pass through the aperture 634.

In the depicted example, when the connector pins 624 are mechanicallyengaged with a mating connector, the upper contact head 642 is displacedto move the stud 646 downward into contact with the contact spring 648to allow for electrical signals to pass from the connector pin 624 andinto the device. In some embodiments, the spring frame 625 can include acompression stop 623 to limit the downward travel or compression of theconnector pin 624 to prevent damage to the electrical connector 620. Thecompression stop 623 can be molded into the spring frame 625. In someembodiments, the spring frame 625 can be supported by the housing of thefunctional module.

As can be appreciated, the connector pins 624 can be biased or urgedupward to space apart the stud 646 from the contact spring 648. Forexample, a biasing spring 643 can bias or urge the connector pin 624upward away from the contact spring 648. The biasing spring 643 canengage against the lower contact head 644. When the connector pin 624 isengaged with a mating connector, the biasing spring 643 can becompressed.

The various connector pins 624 can have different or staggered heights.In some embodiments, the length of the studs 646 of each connector pin624 can be varied to adjust the height of the connector pin 624. Bystaggering the heights of the connector pins 624, the order ofconnection of the connector pins 624 can be controlled. For example, thelongest pin 624 can come into contact with a mating connector before ashorter connector pin 624. Similarly, during disconnection, a shorterconnector pin 624 can be disconnected before a longer connector pin 624is disconnected. By altering the heights of the connector pins 524,certain functions or connections can be made active upon connection orremain active until the end of disconnection.

As can be appreciated, the connection pins 624, the biasing spring thecontact spring 648, and PCB spacers can be formed or coated withconductive materials such as copper, nickel, and/or gold.

FIG. 22 is a detail cross-sectional perspective view of an electricalconnector 720 for a module of a patient care system, in accordance withsome embodiments. In the depicted example, the electrical connector 720can include connector pins 724 that are locked into place to prevent theremoval of the electrical contact. In some embodiments, the connectorpin 724 can include a barbed interface 747 at a lower portion of thestud 746. When the connector pin 724 is displaced or lowered, the barbedinterface 747 of the stud 746 can engage with a contact spring 748 toflex and displace the contact spring 748, latching the connector pin 724into the contacted or lowered position. As illustrated, the barbedinterface 747 can radially extend from the stud 746 and can include aconical shape.

FIG. 23 is a detail cross-sectional perspective view of an electricalconnector 820 for a module of a patient care system, in accordance withsome embodiments. As described, the contact spring 848 facilitateselectrical contact from the connector pin 824 to the PCB 850 of thefunctional module.

In a resting position, the connector pin 824 and the contact spring 848are spaced apart from the PCB 850 and the PCB spacer 852. In the restingposition, no electrical connection is made between the connector pin 824and the PCB 850. In some embodiments, the contact spring 848 biases orurges the connector pin 824 upward away from the PCB 850.

Upon engagement with a mating connector, the connector pins 824 can bedisplaced or otherwise moved downward. By moving the connector pin 824downward, the contact spring 848 can be moved downward to engage withthe PCB spacer 852 of the PCB 850, facilitating an electrical connectionbetween the contact head of the connector pin 824 and the PCB 850 of themodule. In some embodiments, the compliance of the contact spring 848can be configured to allow for contact with a desired engagement forcewithout damaging the PCB spacer 852. In some embodiments, the contactspring 848 can have a reduced thickness compared to conventional contactsprings, providing for reduced spring or biasing force.

In some embodiments, the contact spring 848 can include dual contactpoints at either the PCB contact portion 847 and/or the spring framecontact portion 849. Advantageously, by providing for dual (or multiple)contact points, the contact spring 848 can provide reliable contact andcontamination tolerance.

FIG. 24 is a perspective view of an electrical connector 920 for amodule of a patient care system, in accordance with some embodiments. Inthe depicted example, the electrical connector 920 includes a pluralityof connector coils 924 disposed along the connector face 922. Theconnector coils 924 can be configured to be in meshed engagement withmating connector coils. Advantageously, by providing a meshedengagement, the connector coils 924 can have a large surface contact,enhancing current capacity, life expectancy, and vibration tolerance ofthe electrical connector 920.

In the depicted example, the connector coils 924 are disposed radiallyextending away from the connector face 922. In some embodiments, theconnector coils 924 are affixed in circumferential contact with theconnector face 922. In some embodiments, the connector coils 924 extendradially through the connector face 922.

In some embodiments, the connector coils 924 are wound with conductivewire. The conductive wire can be wound with a pitch that allows a matingconnector coil 924 to overlap and conduct electricity. The pitch of theconnector coils 924 can be configured to provide a sufficient matingforce. As can be appreciated, the wire diameter, length, and shape ofthe connector coil 924 can be configured for various applications. Insome embodiments, the connector coil 924 can include a conductiveplating. The electrical connector 920 can include an elastomericcovering, which may partially cover and/or retain the connector coils924.

FIG. 25 is a plurality of cross-sectional views of an electricalconnector 1020 for a module of a patient case system, in accordance withsome embodiments. In the depicted example, the electrical connector 1020can be configured to control the order of connection and disconnectionof various circuits terminated by the electrical connector 1020. As canbe appreciated, the electrical connectors described herein can beconfigured in a similar manner.

In some embodiments, the various connector pins 1024 a, 1024 b, 1024 c,1024 d can engage with respective contact springs 1048 a, 1048 b, 1048c, 1048 d. In the depicted example, the contact springs 1048 a, 1048 b,1048 c, 1048 d can have different or staggered heights relative to therespective connector pins 1024 a, 1024 b, 1024 c, 1024 d. By staggeringthe heights of the contact springs 1048 a, 1048 b, 1048 c, 1048 d, theorder of connection of the connector pins 1024 a, 1024 b, 1024 c, 1024 dcan be controlled. For example, the tallest contact spring 1048 c cancome into contact with the respective connector pin 1024 c before ashorter contact spring and connector pin. Similarly, duringdisconnection, a shorter contact spring 1048 a can be disconnectedbefore a taller contact spring 1048 c is disconnected. By altering theheights of the contact springs 1048 a, 1048 b, 1048 c, 1048 d, certainfunctions or connections can be made active upon connection or remainactive until the end of disconnection.

For example, the tallest contact spring 1048 c can be coupled to aground channel, the next tallest contact spring 1048 b can be coupled toa power channel, the next tallest contact spring 1048 d can be coupledto a CAN channel, and the shortest contact spring 1048 a can be coupledto a module channel. Therefore, as illustrated, during connection, theground channel connector pin 1024 c can be electrically connected first,the power channel connector pin 1024 b can be coupled next, the CANchannel connector pin 1024 d can be coupled next, and the module channelconnector pin 1024 a can be coupled last. Similarly, duringdisconnection, the channels can be disconnected in reverse order.

In some embodiments, the various connector pins 1024 a, 1024 b, 1024 c,1024 d can have different or staggered heights. In some embodiments, thelength of the studs 1046 a, 1046 b, 1046 c, 1046 d of each connectorpins 1024 a, 1024 b, 1024 c, 1024 d can be varied to adjust the heightof the connector pins 1024 a, 1024 b, 1024 c, 1024 d, controlling theorder of connection of the respective channels.

The foregoing description is provided to enable a person skilled in theart to practice the various configurations described herein. While thesubject technology has been particularly described with reference to thevarious figures and configurations, it should be understood that theseare for illustration purposes only and should not be taken as limitingthe scope of the subject technology.

There may be many other ways to implement the subject technology.Various functions and elements described herein may be partitioneddifferently from those shown without departing from the scope of thesubject technology. Various modifications to these configurations willbe readily apparent to those skilled in the art, and generic principlesdefined herein may be applied to other configurations. Thus, manychanges and modifications may be made to the subject technology, by onehaving ordinary skill in the art, without departing from the scope ofthe subject technology.

As used herein, the phrase “at least one of” preceding a series ofitems, with the term “and” or “or” to separate any of the items,modifies the list as a whole, rather than each member of the list (i.e.,each item). The phrase “at least one of” does not require selection ofat least one of each item listed; rather, the phrase allows a meaningthat includes at least one of any one of the items, and/or at least oneof any combination of the items, and/or at least one of each of theitems. By way of example, the phrases “at least one of A, B, and C” or“at least one of A, B, or C” each refer to only A, only B, or only C;any combination of A, B, and C; and/or at least one of each of A, B, andC.

Furthermore, to the extent that the term “include,” “have,” or the likeis used in the description or the claims, such term is intended to beinclusive in a manner similar to the term “comprise” as “comprise” isinterpreted when employed as a transitional word in a claim. The word“exemplary” is used herein to mean “serving as an example, instance, orillustration.” Any embodiment described herein as “exemplary” is notnecessarily to be construed as preferred or advantageous over otherembodiments.

A reference to an element in the singular is not intended to mean “oneand only one” unless specifically stated, but rather “one or more.” Theterm “some” refers to one or more. All structural and functionalequivalents to the elements of the various configurations describedthroughout this disclosure that are known or later come to be known tothose of ordinary skill in the art are expressly incorporated herein byreference and intended to be encompassed by the subject technology.Moreover, nothing disclosed herein is intended to be dedicated to thepublic regardless of whether such disclosure is explicitly recited inthe above description.

While certain aspects and embodiments of the subject technology havebeen described, these have been presented by way of example only, andare not intended to limit the scope of the subject technology. Indeed,the novel methods and systems described herein may be embodied in avariety of other forms without departing from the spirit thereof. Theaccompanying claims and their equivalents are intended to cover suchforms or modifications as would fall within the scope and spirit of thesubject technology.

Various examples of aspects of the disclosure are described below asclauses for convenience. These are provided as examples, and do notlimit the subject technology.

Clause 1. A module for a patient care system, the module comprising: ahousing having an attachment side configured to releasably attach to anadjacent electronic module; a latch mechanism configured to engage acatch member on the adjacent electronic module to secure the attachmentside to the adjacent electronic module; an electrical connectorpositioned on the attachment side and configured to electrically connectto an adjacent electrical connector on the adjacent electronic module;and a sensor coupled to the housing and configured to detect movement ofthe latch mechanism.

Clause 2. The module of Clause 1, wherein the latch mechanism includes arotatable latch body.

Clause 3. The module of Clause 2, wherein the sensor is configured todetect rotation of the latch body.

Clause 4. The module of Clause 1, wherein the latch mechanism includes atranslatable latch body.

Clause 5. The module of Clause 4, wherein the sensor is configured todetect translation of the latch body.

Clause 6. The module of Clause 1, wherein the latch mechanism includes alatch body configured to rotate and translate.

Clause 7. The module of Clause 6, wherein the sensor is omni-directionaland is configured to detect rotation and translation of the latch body.

Clause 8. The module of Clause 1, wherein the sensor comprises a halleffect sensor.

Clause 9. The module of Clause 1, wherein the sensor comprises anoptical interrupt sensor.

Clause 10. The module of Clause 1, wherein the sensor comprises acapacitance sensor.

Clause 11. The module of Clause 1, wherein the sensor comprises aninductance sensor.

Clause 12. A module for a patient care system, the module comprising: ahousing having an attachment side configured to releasably attach to anadjacent electronic module; and an electrical connector positioned onthe attachment side and configured to electrically connect to anadjacent electrical connector on the adjacent electronic module.

Clause 13. The module of Clause 12, wherein the electrical connectorincludes an elastomeric seal.

Clause 14. The module of Clause 13, wherein the elastomeric sealcomprises a radial seal.

Clause 15. The module of Clause 13, wherein the elastomeric sealcomprises an axial seal.

Clause 16. The module of Clause 12, wherein the electrical connectorcomprises a plurality of connector pins.

Clause 17. The module of Clause 16, wherein at least one of connectorpins of the plurality of connector pins is retained by a seal.

Clause 18. The module of Clause 16, further comprising a plurality ofcontact springs spaced apart from the plurality of connector pins,wherein the plurality of connector pins are configured to contact theplurality of contact springs.

Clause 19. The module of Clause 18, wherein a first contact spring ofthe plurality of contact springs has a first height and a second contactspring of the plurality of contact springs has a second height, thefirst height being different than the second height.

Clause 20. The module of Clause 16, wherein a first connector pin of theplurality of connector pins has a first height and a second connectorpin of the plurality of connector pins has a second height, the firstheight being different than the second height.

In some embodiments, any of the clauses herein may depend from any oneof the independent clauses or any one of the dependent clauses. In oneaspect, any of the clauses (e.g., dependent or independent clauses) maybe combined with any other one or more clauses (e.g., dependent orindependent clauses). In one aspect, a claim may include some or all ofthe words (e.g., steps, operations, means or components) recited in aclause, a sentence, a phrase or a paragraph. In one aspect, a claim mayinclude some or all of the words recited in one or more clauses,sentences, phrases or paragraphs. In one aspect, some of the words ineach of the clauses, sentences, phrases or paragraphs may be removed. Inone aspect, additional words or elements may be added to a clause, asentence, a phrase or a paragraph. In one aspect, the subject technologymay be implemented without utilizing some of the components, elements,functions or operations described herein. In one aspect, the subjecttechnology may be implemented utilizing additional components, elements,functions or operations.

What is claimed is:
 1. A module for a patient care system, the modulecomprising: a housing having an attachment side configured to releasablyattach to an adjacent electronic module; a latch mechanism configured toengage a catch member on the adjacent electronic module to secure theattachment side to the adjacent electronic module; an electricalconnector positioned on the attachment side and configured toelectrically connect to an adjacent electrical connector on the adjacentelectronic module; and a sensor coupled to the housing and configured todetect movement of the latch mechanism.
 2. The module of claim 1,wherein the latch mechanism includes a rotatable latch body.
 3. Themodule of claim 2, wherein the sensor is configured to detect rotationof the latch body.
 4. The module of claim 1, wherein the latch mechanismincludes a translatable latch body.
 5. The module of claim 4, whereinthe sensor is configured to detect translation of the latch body.
 6. Themodule of claim 1, wherein the latch mechanism includes a latch bodyconfigured to rotate and translate.
 7. The module of claim 6, whereinthe sensor is omni-directional and is configured to detect rotation andtranslation of the latch body.
 8. The module of claim 1, wherein thesensor comprises a hall effect sensor.
 9. The module of claim 1, whereinthe sensor comprises an optical interrupt sensor.
 10. The module ofclaim 1, wherein the sensor comprises a capacitance sensor.
 11. Themodule of claim 1, wherein the sensor comprises an inductance sensor.12. A module for a patient care system, the module comprising: a housinghaving an attachment side configured to releasably attach to an adjacentelectronic module; and an electrical connector positioned on theattachment side and configured to electrically connect to an adjacentelectrical connector on the adjacent electronic module.
 13. The moduleof claim 12, wherein the electrical connector includes an elastomericseal.
 14. The module of claim 13, wherein the elastomeric seal comprisesa radial seal.
 15. The module of claim 13, wherein the elastomeric sealcomprises an axial seal.
 16. The module of claim 12, wherein theelectrical connector comprises a plurality of connector pins.
 17. Themodule of claim 16, wherein at least one of connector pins of theplurality of connector pins is retained by a seal.
 18. The module ofclaim 16, further comprising a plurality of contact springs spaced apartfrom the plurality of connector pins, wherein the plurality of connectorpins are configured to contact the plurality of contact springs.
 19. Themodule of claim 18, wherein a first contact spring of the plurality ofcontact springs has a first height and a second contact spring of theplurality of contact springs has a second height, the first height beingdifferent than the second height.
 20. The module of claim 16, wherein afirst connector pin of the plurality of connector pins has a firstheight and a second connector pin of the plurality of connector pins hasa second height, the first height being different than the secondheight.